Signal processing apparatus for video signals with a different display format.

摘要

The present invention has a function to process plural kinds of video signals and relates to a video signal processing apparatus used for displaying each one of the processed outputs of the plural kinds of video signals on the same screen. In the video signal processing apparatus, a memory used for a subtitle processing circuit and a memory used for a helper signal separation circuit are used in common by providing a switching means to switch according to an input video signal. The subtitle processing circuit magnifies a video signal with a letter box format like that a horizontally long picture is inserted in a picture with a 4:3 aspect ratio on a horizontally long screen with 2:1 or 16:9 aspect ratio. The helper signal separation circuit is used for receiving a television signal such as EDTV 2 system which has a helper signal to improve picture quality. <IMAGE>